Tabanidae
Tabanomorpha
Tabulata(EXTINCT) (monophyly uncertain)
Tabuloconida(EXTINCT)
Tacata
Taccaceae
Tachidiidae
Tachinidae
Tachininae
Tachiniscidae
Tachinomorphus
Tachinoporus
Tachinoproporus
Tachinus
T-(Japanotachinus)
T-(Latotachinus)
T-(Tachinoderus)
T-(Tachinoplesius)
T-(Tachinus)
Tachiona
Tachychara
Tachycnemis
Tachyeres(Steamer Ducks)
T-brachypterus(Falkland Steamer Duck)
T-leucocephalus(Chubut Steamer Duck)
T-patachonicus(Flying Steamer Duck)
T-pteneres(Fuegian Steamer Duck)
Tachyglossidae(echidnas)
Tachyglossus aculeatus(short-beaked echidna)
Tachyina
Tachypeles
T-arechavaletae
T-lecordieri
T-pascoei
Tachypleus
T-decheni(EXTINCT) (incertae sedis)
T-gigas
T-tridentatus
Tachyporinae(non-monophyletic)
Tachyporini
Tachyporoides(EXTINCT)
Tachyporus
T-(Palporus)
T-(Tachyporus)
Tachys
Tachyta
Tachyusa
Tachyusida
Tacola
T-eulimene
T-larymna
T-magindana
Tacuna
Tadorna(Shelducks)
T-cana(South African Shelduck)
T-ferruginea(Ruddy Shelduck)
T-radjah(Raja Shelduck)
T-tadorna(Common Shelduck)
T-tadornoides(Australian Shelduck)
T-variegata(Paradise Shelduck)
Taenaris
T-alocus
T-artemis
T-bioculatus
T-butleri
T-catops
T-chionides
T-cyclops
T-diana
T-dimona
T-dina
T-dioptrica
T-domitilla
T-gorgo
T-honrathi
T-horsfieldii
T-hyperbolus
T-macrops
T-mailua
T-montana
T-myops
T-onolaus
T-phorcas
T-schoenbergi
T-scylla
T-selene
T-urania
Taeniacanthidae
Taenionema
T-atlanticum
T-californicum
T-grinnelli
T-jacobii
T-japonicum
T-jewetti
T-kincaidi
T-oregonense
T-pacificum
T-pallidum
T-raynorium
T-uinta
T-umatilla
Taeniopterygidae
Taeniopteryx
Taenodema
Tagalomantis
T-brevis
T-manillensis
Tagiades
T-calligana
T-cohaerens
T-distans
T-flesus
T-gana
"Tagiades group"
T-hybridus
T-insularis
T-japetus
T-lavata
T-litigiosa
T-menaka
T-nestus
T-obscurus
T-parra
T-saborana
T-toba
T-trebellius
T-ultra
T-waterstradti
Tagiadini
Tagulinus
Tagulis
Tahitia
Tainochus
Taira
Tairella
Taiwanophodes
Tajmyraphididae(EXTINCT) (incertae sedis)
Takachihoa
Takagripopteryx(incertae sedis)
Takakiales(incertae sedis)
Takaorites
Takashia
Takhtajania
Takobiella
Takuidae
Talaridris mandibularis
Talarurus(EXTINCT)0(incertae sedis)
Talaus
Talavera
T-aequipes
T-inopinata
T-minuta
Talbotia
Taldycupedidae(EXTINCT)
Taldycupes(EXTINCT)
Talegalla
T-cuvieri(Red-billed Brushturkey)
T-fuscirostris(Black-billed Brushturkey)
T-jobiensis(Collared Brushturkey)
Talides
T-alternata
T-cantra
T-hispa
T-riosa
T-sergestus
T-sinois
Tallaperla
Talliella
Talpidae(moles, shrew moles, desmans)
Tamanalces(EXTINCT)
Tamania jacquelinae
Tamaricaceae
Tamarindus
Tamgrinia
Tamias(chipmuncks)
Tamiasciurini(chickarees)
Tamilla
Tamiops
Tamolanica(monophyly uncertain)
T-andaina
T-atricoxis
T-denticulata
T-dilena
T-katauana
T-leopoldi
T-pectoralis
T-phryne
T-splendida
T-tamolana
Tamotus
Tanaecia
T-aruna
T-borromeoi
T-calliphorus
T-cibaritis
T-clathrata
T-coelebs
T-coyctus
T-dodong
T-flora
T-godartii
T-howarthi
T-iapis
T-jahnu
T-julii
T-lepidea
T-leucotaenia
T-munda
T-orphne
T-palguna
T-pelea
T-susoni
T-trigerta
Tanaeoceroideanov
Tanaidacea
Tanaostigmatidae
Tanaupodoidea
Tangarona
TaningiaJoubin 1931
Tannea
Tannerella
Tantulocarida
Tanychora(EXTINCT)
Tanyderidae
Tanygnathinina
Tanymykter(EXTINCT)
Tanypezidae
Tanypleuridae
Tanyrhinus
Tanysiptera
Tanystetha
Tanystigma
Tanystylum
Tanythrix
Tanzaniophasma subsolana
TaoniinaePfeffer 1912
Taoniscus nanus(Dwarf Tinamou)
TaoniusSteenstrup, 1861
T-borealis
T-pavo
Tapecomys
Tapena thwaitesi
Taphoxomimus leleupi
Taphrinomycetes
Taphrinomycotina
Taphrocampa
Taphroscelidia
Taphroscydmus
Tapiloites
Tapinillus
Tapinolepis
T-bothae
T-candida
T-deceptor
T-decolor
T-litoralis
T-longitarsis
T-macgregori
T-macrophthalma
T-mediterranea
T-melanaria
T-pernix
T-simulans
T-trimenii
T-tumidula
Tapinoma
Tapinopterus
Tapinotaspidini
Tapiridae(tapirs & extinct relatives)
Tapirulus(EXTINCT)
Tapiscia sinensis
Tapponia
Tarachina
T-brevipennis
T-congica
T-constricta
T-occidentalis
T-rammei
T-raphidioides
T-schultzei
T-seriepunctata
T-transvaalensis
T-werneri
T-zernyi
Tarachodella monticola
Tarachodes
T-(Barbachodes) afzelii
T-(Chiropacha)
TC-aestuans
TC-arabicus
TC-gilvus
TC-obtusiceps
TC-saussurei
TC-smithi
T-(Chiropus)
TC-bispinosus
TC-dives
TC-sjoestedti
T-(Tarachodes)
TT-abyssinicus
TT-alluaudi
TT-beieri
TT-bicornis
TT-brevipennis
TT-chopardii
TT-circulifer
TT-circuliferoides
TT-davidi
TT-feae
TT-fraterculus
TT-fuscipennis
TT-gibber
TT-gigas
TT-griseus
TT-haedus
TT-insidiator
TT-karschii
TT-lucubrans
TT-maurus
TT-monstrosus
TT-namibiensis
TT-nubifer
TT-obscuripennis
TT-okahandyanus
TT-oxynotus
TT-rhodesicus
TT-robustus
TT-rotundiceps
TT-sanctus
TT-severini
TT-taboranus
TT-tananus
TT-thomseni
TT-usambarica
TT-vitreus
T-(Tarachodina)
TT-basinotatus
TT-dissimulator
TT-gerstaeckeri
TT-maculisternum
TT-natalensis
TT-similis
Tarachodidae
Tarachodinae
Tarachodula
T-ornata
T-pantherina
Tarachomantis
T-alaotrana
T-betanimena
T-betsilea
T-caldwellii
T-confusa
T-hova
T-rubiginosa
T-sakalava
Taractostephanus elegantissima(?Actinia) Brandt 1835
Taractrocera
T-anisomorpha
T-archias
T-ardonia
T-ceramas
T-danna
T-dolon
T-flavoides
T-ilia
T-ina
T-luzonensis
T-maevius
T-nigrolimbata
T-papyria
T-sp. n.
Taractrocerini
Taraktomora
Tarattia(incertae sedis)
T-bruijni
T-libnites
Tarattia lycone
Tarattia lymire
T-lysanias
Taraxella
Tarbosaurus bataar(EXTINCT)
Tarchia(EXTINCT)
Tardigrada(water bears)
Tarditermes
Taricha
Tariona
Tarphiota
Tarracolimulus crespelli(EXTINCT)
Tarrasiiformes(EXTINCT)
Tarrocanus
Tarsii(tarsiers)
Tarsilister(incertae sedis)
Tarsocera
T-cassina
T-cassus
T-dicksoni
T-fulvina
T-imitator
T-namaquensis
T-southeyae
Tarsoctenus
T-corytus
T-papias
T-praecia
Tarsomys
Tarsoporosus
Tarsopterella(EXTINCT) (incertae sedis)
Tartariella
Tartaroblatta
Tasgius
T-(Rayacheila)
T-(Tasgius)
Tasmanentulus
Tasmanicosa
Tasmaniella
Tasmanitachoides
Tasmanityrus
Tasmannia
Tasmanosthetus
Tasmiidae
Tathicarpus
Tatinga
Tatochila
T-autodice
T-distincta
T-homeodice
T-inversa
T-mariae
T-mercedis
T-orthodice
T-sagittata
T-stigmadice
T-theodice
T-xanthodice
Tatuidris tatusia
Taucanamo(EXTINCT)
Taudactylus
Taumantis
T-cephalotes
T-globiceps
T-sigiana
Taurablepton
Tauritermes
Tauromantis
Tavakilianidia
Taxaceae
Taxicera
Taxicerina
Taxila
Taximastinocerus
Taxiplagus
Tayassu pecari(white-lipped peccary)
Tayassuidae(peccaries)
Tayassuinae
Taydebis
Taygetina
Taygetis
T-[n. sp. 1]
T-[n. sp. 2]
T-acuta
T-angulosa
T-asterie
T-chiquitana
T-chrysogone
T-cleopatra
T-echo
T-elegia
T-inambari
T-inconspicua
T-kerea
T-laches
T-larua
T-leuctra
T-mermeria
T-rectifascia
T-sosis
T-sylvia
T-thamyra
T-tripunctata
T-uncinata
T-uzza
T-virgilia
T-weymeri
T-ypthima
T-zippora
Taygetomorpha
T-[n. sp.]
T-celia
T-puritana
Taymyrelectronidae(EXTINCT) (incertae sedis)
Taypaliito
Tchirkovaea(EXTINCT)
Tchirkovaeidae(EXTINCT)
Tealia
Tealia bunodiformisHertwig 1882
Tealianthus
Tealidium
Tealidium cinctumStuckey 1909
T-cingulatumR. Hertwig 1882
T-jungerseniCarlgren 1921
Tealiopsis nigrescensVerrill 1928
Tealiopsis polarisDanielssen 1890
Technomyrmex
Tecophiliaceae
Tecticupes(EXTINCT)
Tectiviridae
Tectoptilus(EXTINCT)
Tectosternum
Tectusa
Teddia dioscoris
Tedeleaceae(EXTINCT)0(incertae sedis)
Tegastidae
Tegecoelotes
Tegeticula(true yucca moths)
T-altiplanella
T-baccatella
T-carnerosanella
T-cassandra
T-corruptrix
T-elatella
T-intermedia
T-maculata
T-maderae
T-mojavella
T-rostratella
T-superficiella
T-synthetica
T-treculeanella
T-yuccasella
T-yuccasella complex
Tegobomolochidae
Tegosa
T-anieta
T-claudina
T-etia
T-flavida
T-fragilis
T-guatemalena
T-infrequens
T-nazaria
T-nigrella
T-orobia
T-pastazena
T-selene
T-serpia
T-tissoides
Tehuankea
Teicophryinae(incertae sedis)
Teinopalpini
Teinopalpus
Teinotarsus(2 species)
Teiros
Tekalita
Telamonia
Telegeusidae(long-lipped beetles)
Telegeusis
Telemiades
T-amphion
T-antiope
T-avitus
T-centrites
T-choricus
T-chrysorrhoea
T-corbulo
T-delalande
T-epicalus
T-gallius
T-laogonus
T-litanicus
T-megallus
T-meris
T-nicomedes
T-oiclus
T-penidas
T-sila
T-squanda
T-trenda
T-vansa
T-vespasius
Telemidae
Telenassa
T-abas
T-berenice
T-delphia
T-fontus
T-jana
T-notus
T-sepultus
T-teletusa
Telengaiinae
Teleostei(most living ray-finned fish)
Teleostomi
Telethera
Teleutomyrmex
T-kutteri
T-schneideri
Telicota
T-ancilla
T-angiana
T-anisodesma
T-argeus
T-aroa
T-augias
T-bambusae
T-besta
T-brachydesma
T-brandti
T-bulwa
T-colon
T-doba
T-elsa
T-eurotas
T-fenia
T-gervasa
T-hilda
T-ixion
T-kaimana
T-kezia
T-linna
T-melanion
T-mesoptis
T-mimena
T-ohara
T-paceka
T-pythias
T-sadra
T-sadrella
T-solva
T-subha
T-ternatensis
T-vinta
Telipna
T-acraeathe Tiger
T-acraeoides
T-albofasciata
T-atrinervis
T-aurivillii
T-cameroonensis
T-citrimaculata
T-consanguinea
T-erica
T-exsuperia
T-hollandi
T-kayonza
T-lotti
T-maesseni
T-medjensis
T-nyanza
T-plagiata
T-rothi
T-rufilla
T-ruspinoides
T-sanguinea
Telipna section(monophyly uncertain)
T-semirufa
T-sheffieldi
T-sulpitia
T-transverstigna
T-villiersi
Teliusa
Tellervinini
Tellervo assarica
Tellervo hiero
Tellervo juriaansei
Tellervo nedusia
Tellervo parvipuncta
Tellervo zoilus
Telles
T-arcalaus
T-pyrex
Tellona
Telmatactis
T-Valle Flori[sic] Gravier 1918
T-australiensisCarlgren 1949
T-insignisCarlgren 1949
T-natalensisCarlgren 1938
T-stephensoniCarlgren 1949
Teloleptoneta
Telomantis
T-lamperti
T-robusta
Telonema(genus of heterotrophic flagellates)
Teloschistales
Telotyphlus
Telsidae
Telsonemasomatidae
Temenis
T-huebneri
T-laothoe
T-pulchra
Temnelytra
Temnodera(EXTINCT)
Temnomastacinae
Temnopteryx
Temnospondyli(EXTINCT)
Temnothorax
T-abeli
Temoridae
Tempskyaceae(EXTINCT)0(incertae sedis)
Tenacibaculum
Tenebrionidae(darkling beetles)
Tenebrionoidea(darkling beetles, blister beetles, etc.)
Tengellidae
Teniorhinus
T-harona
T-herilus
T-ignita
T-watsoni
Tenodera
T-angustipennis
T-aridifolia
T-australasiae
T-blanchardi
T-brevicollis
T-caudafissilis
T-costalis
T-fasciata
T-phillippina
T-rungsi
T-sinensis
T-stoetzneri
T-superstitiosa
Tenomerga
T-anguliscutis
T-cinerea
T-favella
T-gaolingziensis
T-japonica
T-kapnodes
T-kurasawai
T-leucophaea
T-moultoni
T-mucida
T-sibyllae
T-tianmuensis
T-trabecula
T-yamato
Tenrec ecaudatus(tailless tenrec)
Tenrecidae(tenrecs, Madagascar "hedgehogs")
Tenrecinae (spiny tenrecs )
Tenthredinoidea
Tenthyridium(EXTINCT) (incertae sedis)
Tenuignathia
Tenuirostritermes
Tenuivirus
Tephritidae
Tephritoidea
Tepidibacter
Tepilia
Terametopon(3 species)
Teraphis
Terapus
Terataner
T-alluaudi
T-bottegoi
T-elegans
T-foreli
T-luteus
T-piceus
T-rufipes
T-scotti
T-steinheili
T-transvaalensis
T-velatus
T-xaltus
Teratanytoma
Teratembia
Teratembiidae
Terathopius
Teratodinae
Teratolister
Teratomyrmex greavesi
Teratomyzidae
Teratophthalma
T-axilia
T-bacche
T-maenades
T-monochroma
T-phelina
Teratosoma
Teratotarsa
Terebellida
Terebelliformia
Terebrantia
Teretriini(non-monophyletic)
Teretriopsis
Terias
T-ada
T-alitha
T-andersonii
T-blanda
T-candida
T-celebensis
T-floricola
T-hapale
T-hecabe
T-irena
T-lacteola
T-lombokiana
T-mandarinula
T-novopallida
T-puella
T-regularis
T-sana
T-sari
T-sarilata
T-senegalensis
T-simulatrix
T-smilax
T-tilaha
T-tominia
T-upembana
Terinos
T-abisares
T-alurgis
T-atlita
T-clarissa
T-maddelena
T-taxiles
T-terpander
T-tethys
Teriocolias
Termella
Termes
Termes group
Termitana
Termitaphididae
Termitella
Termitellodes
Termitidae(Higher termites)
Termitinae(non-monophyletic)
Termitobaena
Termitobia
Termitoblatta
Termitobra
Termitocharina
Termitocola
Termitocomes
Termitocupidina
Termitodiscina
Termitodiscini
Termitodiscus
Termitoecia
Termitogaster
Termitogastrina
Termitogerrus
Termitogeton
Termitoglobus
Termitognathus
Termitohospes
Termitohospitina
Termitohospitini
Termitoiceina
Termitoiceus
Termitoides
Termitolara
Termitolinus
Termitolister
Termitomimus
Termitomorpha
Termitona
Termitonannina
Termitonannini
Termitonannus
Termitonasus
Termitonda
Termitonicus
Termitonidia
Termitonilla
Termitonusa
Termitopaedia
Termitopaediini
Termitopelta
Termitophagus
Termitophya
Termitopithina
Termitoplus
Termitopone marginata
Termitopsenius
Termitoptochina
Termitoptochus
Termitoptocinus
Termitopula
Termitopulex
Termitopullus
Termitoquedius
Termitosaurus
Termitoscaphium
Termitosius
Termitosocius
Termitosodalis
Termitospectrina
Termitospectrum
Termitosuga
Termitosymbia
Termitosyne
Termitosynodes
Termitotecna
Termitotelina
Termitotelus
Termitotropha
Termitotyrus
Termitoxenus
Termitozophilus
Termitozyras
Termitozyrina
Termituncula
Termitusa
Termitusina
Termitusini
Termitusodes
Termophidoholus
Termopsidae(Dampwood termites)
Termozyras
Ternstroemiaceae
Teropalpus
Teropha
Terrabacter
Terracoccus
Terralonus
T-californicus
T-fraternus
T-mylothrus
T-shaferi
T-unicus
T-versicolor
T-vittatus
Terrecorvonia
Terrestrial Vertebrates(mammals, reptiles, amphibians, birds etc.)
Terrestricytheridae
Tersoides(EXTINCT)
Tersus(EXTINCT)
Teruelia(EXTINCT)
Tesba
Tesnusocaris goldichi(EXTINCT) (Tesnus Formation, Lower Pennsylvanian)
Tessaracoccus
Tessaratomidae
Testudinella
Testudinellidae
Testudines(turtles, tortoises and terrapins) (incertae sedis)
Tetanurae
Tetartopeus
Tetheamyrma subspongia
Tethinidae
Tethocyathus
Tethytragus(EXTINCT)
Tetimatermes
Tetraberlinia
Tetrablemmidae
Tetrabothrus
Tetrabrachiidae(Four-armed frogfish)
Tetracampidae
Tetracanthognathus
Tetracapsuloides bryosalmonae(Tetracapsula bryosalmonae)
TetracheledoneVoss, 1955
Tetrachondraceae
Tetraclitidae
Tetraconodon(EXTINCT)
Tetraconodontinae(EXTINCT)
Tetractinomorpha
Tetradelus
Tetradonella
Tetradonia
Tetradoxa omeiensis
Tetragenococcus
Tetraglyptinus
Tetraglyptus
Tetragma gei
Tetragnathidae
Tetragnypeta
Tetragonicipitidae
Tetragonoderus
Tetragonus
Tetraleucus
Tetralophodes
Tetramelaceae
Tetrameringia
T-aethiopicaStuckenberg
T-borealisSueyoshi
T-distoma(Verbeke)
T-pubescensMcAlpine
T-stuckenbergiBarraclough
T-ustulataMcAlpine
Tetrameristaceae
Tetramerium Lineage
Tetrameryx(EXTINCT)
Tetramoriini
Tetramorium
T-aculeatum
Tetraneura
Tetraneurini
Tetranychoidea
Tetrao(Capercaillies)
T-parvirostris(Black-billed Capercaillie)
T-urogallus(Western Capercaillie)
Tetraodontidae
Tetraodontiformes(triggerfishes, puffers, and allies)
Tetraogallus(Snowcock)
T-altaicus(Altai Snowcock)
T-caspius(Caspian Snowcock)
T-caucasicus(Caucasian Snowcock)
T-himalayensis(Himalayan Snowcock)
T-tibetanus(Tibetan Snowcock)
Tetraophasis(Monal-Partridges)
T-obscurus(Verreaux's Monal-Partridge)
T-szechenyii(Szechenyi's Monal-Partridge)
Tetrapediini
Tetraphalerus
T-antiquus(EXTINCT)
T-bontsaganensis(EXTINCT)
T-brevicapitis(EXTINCT)
T-brevis(EXTINCT)
T-bruchi
T-collaris(EXTINCT)
T-fentaiensis(EXTINCT)
T-glabratus(EXTINCT)
T-grandis(EXTINCT)
T-incertus(EXTINCT)
T-longicollis(EXTINCT)
T-macilentus(EXTINCT)
T-maximus(EXTINCT)
T-mongolicus(EXTINCT)
T-notatus(EXTINCT)
T-ochotensis(EXTINCT)
T-oligocenicus(EXTINCT)
T-surrectus(EXTINCT)
T-tenuipes(EXTINCT)
T-verrucosus(EXTINCT)
T-wagneri
Tetraphidopsida
Tetraphlebia germainii(incertae sedis)
Tetrapleurodon
Tetrapleurus
Tetrapoda
Tetraponera
Tetrapriocera
Tetrascapha
Tetrasiphon
Tetrasiphonidae
Tetrasphaera
Tetrasquillidae
Tetrastemmatidae(non-monophyletic)
Tetrastes(Hazel Grouse and Severtzov's Grouse)
T-bonasia(Hazel Grouse)
T-sewerzowi(Severtzov's Grouse)
Tetrathalamus
Tetrathylacium
Tetratomidae(polypore fungus beetles)
Tetraulacus
Tetraviridae
Tetrax tetrax(Little Bustard)
Tetrigidae
Tetriginae
Tetrigoidea
Tetrodontophorinae
Tetropina
Tetrosorius
Tettigarctidae(tettigarctid cicadas)
Tettigometridae
Tettigoniidae(katydids, long-horned grasshoppers and bushcrickets)
Tettigoniinae(Shield-backed katydids)
TeuthoweniaChun, 1910
T-maculataLeach 1817
T-megalopsProsch 1947
T-pellucida(Chun 1910)
Teuthraustes
Texamaurops
Texasetes(EXTINCT)0(incertae sedis)
Texoceros(EXTINCT)
Texola
T-anomalus
T-elada
Thaerocytheridae
Thaites ruminiana(EXTINCT) (incertae sedis)
Thalamophyllia
Thalassianthidae
Thalassianthus
T-asterLeuckart in Rueppel 1828
T-kraepeliniCarlgren 1900
T-senckenbergianusKwietniewski 1897
Thalassinidea
Thalassocalycida
Thalassornis leuconotus(White-backed Duck)
Thalattosiren(EXTINCT)
Thaleroceros(EXTINCT)
Thaleropis
Thalestridae
Thallomys
Thalpomys(incertae sedis)
Thamiaraeina
Thammaca
Thamnocephalidae
Thamnomolgidae
Thamnophilidae(typical antbirds)
Thanatites(EXTINCT) (incertae sedis)
Thanatophilus
Thanatophyllum
Thargella
T-caura
T-evansi
Tharpyna
Tharrhalea
Tharybidae
Thaumactis medusoidesFowler 1889
Thaumaleidae
Thaumantis
T-diores
T-klugius
T-noureddin
T-odana
Thaumastellidae
Thaumastocephalini
Thaumastochelidae
Thaumastocoridae(royal palm bugs)
Thaumastodermatidae
Thaumastodinae
Thaumastognathus(EXTINCT)
Thaumataerius
Thaumatevania ensifera
Thaumatichthyidae(Wonderfishes)
Thaumatichthys
Thaumatocyprididae
Thaumatomonads(several genera of heterotrophic flagellates)
Thaumatomyrmex(incertae sedis)
T-atrox
T-bariay
T-cochlearis
T-contumax
T-ferox
T-mandibularis
T-mutilatus
T-nageli
Thaumatopauropus
Thaumatopsyllidae
ThaumeledoneRobson, 1930*
Thauria
Thaxteriella
The other protists(cryptomonads, euglenids, glaucophytes, etc.) (non-monophyletic)
Theaceae(tea family)
Theagenes
T-aegides
T-albiplaga
T-dichrous
Thecabius
Theclini
Thecocyathidae(EXTINCT)
Thecostraca(barnacles and their relatives)
Thectonota
Thecturella
Thecturota
Theganopteryx
Theileria
Theileriidae
Thelaceros rhizophoreaeMitchell 1890
Thelaxidae
Thelebolales
Thelephorales
Theloderma
Thelodonti(EXTINCT) (non-monophyletic) (incertae sedis)
Thelotia
Thelyphonida(whiptailed scorpions, vinegaroons, uropygids)
Thelypteridaceae
Themidaceae
Themiste
Themone
T-pais
T-poecilia
T-pulcherrima
Thenaria
Theocerina
Theocerus
Theochila
Theope
T-acosma
T-amicitiae
T-antanitis
T-apheles
T-archimedes
T-atima
T-aureonitens
T-azurea
T-bacenis
T-barea
T-basilea
T-batesi
T-brevignoni
T-busbyi
T-christiani
T-comosa
T-cratylus
T-dabrerae
T-decorata
T-devriesi
T-discus
T-eudocia
T-eupolis
T-eurygonina
T-excelsa
T-fayneli
T-foliorum
T-galionicus
T-guillaumei
T-hypoleuca
T-iani
T-janus
T-kingi
T-lampropteryx
T-leucanthe
T-lycaenina
T-matuta
T-methemona
T-mundula
T-nobilils
T-nodosus
T-nycteis
T-orphana
T-pakitza
T-pedias
T-pepo
T-phaeo
T-philotes
T-pieridoides
T-pseudopedias
T-publius
T-sanjuani
T-sericea
T-simplicia
T-sisemina
T-sobrina
T-speciosa
T-sticheli
T-syngenes
T-terambus
T-tetrastigma
T-theritas
T-thestias
T-thootes
T-turneri
T-villai
T-virgilius
T-wallacei
T-zostera
Theophrastaceae
Theopina
Theopompa
T-borneana
T-burmeisteri
T-ophthalmica
T-servillei
T-tosta
Theopompella
T-aurivillii
T-chopardi
T-congica
T-elegans
T-fusca
T-heterochroa
T-orientalis
T-pallida
T-westwoodi
Theopropus
T-borneensis
T-cattulus
T-elegans
Theprisa
Theraphosidae(tarantulas, bird-eating spiders)
Therapsida(mammals and their extinct relatives)
Therea
Thereutis
Therevidae
Therevinae
Thericleidae
Thericleinae
Theridiidae(cobweb weavers, black widows, etc.)
Theridiinae
Theridioids
Theridiosoma
Theridiosomatidae(ray spiders)
Theridomorpha(EXTINCT) (incertae sedis)
Theriodontia
Therizinosauridae(EXTINCT)
Thermacetogenium
Thermanaeromonas
Thermanaerovibrio
Thermicanus
Thermoactinomyces
Thermoaerobacter
Thermoanaerobacter
Thermoanaerobacteriales
Thermoanaerobacterium
Thermoanaerobium
Thermobacillus
Thermobifida
Thermobispora
Thermobrachium
Thermococcales
Thermocrinis
Thermocrispum
Thermodesulfatator
Thermodesulfobacteria(thermophilic, sulfate-reducing bacteria)
Thermodesulfobacterium
Thermodesulfobium
Thermodesulfovibrio
Thermodiscus
Thermofilum
Thermohalobacter
Thermohydrogenium
Thermoleophilum
Thermomicrobia(hyperthermophilic chemoheterotrophs)
Thermomonospora
Thermonema
Thermoplasmales
Thermoproteus
Thermopsideae(monophyly uncertain)
Thermosbaenacea
Thermosipho
Thermosphaera
Thermosyntropha
Thermoterrabacterium
Thermotoga
Thermotogae(hyperthermophilic, obligately anaerobic, fermentive heterotrophs)
Thermovenabulum
Thermovibrio(incertae sedis)
Thermozodium esakii(Mesotardigrada)
Thermus
Therocephalia(EXTINCT)
Theropithecus
Theropoda(bipedal predatory dinosaurs, including birds)
Thesiastes
Thesiectus
Thesium
Thesoneura(EXTINCT)
Thespidae(non-monophyletic)
Thespieus
T-abatira
T-abauna
T-argentina
T-aspernatus
T-caraca
T-castor
T-catochra
T-dalman
T-duidensis
T-ethemides
T-fassli
T-fulvangula
T-haywardi
T-hieroglyphica
T-himella
T-homochromus
T-inez
T-jora
T-lutetia
T-macareus
T-matucanae
T-opigena
T-othna
T-peruviae
T-pinda
T-tapayuna
T-thona
T-tihoneta
T-vividus
T-xarina
T-xarippe
T-zikani
Thespinae
Thespini
Thespis
T-disparilis
T-dissimilis
T-exposita
T-major
T-media
T-metae
T-parva
Thespoides bolivari
Thesprotia
T-brasiliensis
T-brevis
T-caribea
T-filum
T-fuscipennis
T-gigas
T-graminis
T-infumata
T-insolita
T-macilenta
T-maculata
T-pellucida
T-simplex
T-subhyalina
Thesprotiella
T-bicorniculata
T-festae
T-fronticornis
T-peruana
T-similis
Thessia
T-athesis
T-jalapus
Thestylus
Thetapapillomavirus
Thiania
Thiasophila
T-(Apatusa)
T-(Thiasophila)
Thiemeia(incertae sedis)
Thinobiosus
Thinobius
Thinocafius
Thinocharis
Thinocoridae(seedsnipe)
Thinodromus
Thinohyus(EXTINCT)
Thinonoma
Thinopinus
Thinusa
Thiodina
T-candida
T-crucifera
T-germaini
T-inerma
T-melanogaster
T-nicoleti
T-pallida
T-pseustes
T-puerpera
T-punctulata
T-robusta
T-setosa
T-sylvana
T-vaccula
T-vellardi
Thiodininae
Thisbe
T-hyalina
T-incubus
T-irenea
T-lycorias
T-molela
T-rupestre
T-ucubis
Thismiaceae
Thitarodes
T-albipictus
T-anomopterus
T-arizanus
T-armoricanus
T-baimaensis
T-baqingensis
T-callinivalis
T-cingulatus
T-damxungensis
T-danieli
T-dierli
T-dongyuensis
T-eberti
T-ferrugineus
T-gonggaensis
T-jialangensis
T-jianchuanensis
T-jinshanensis
T-kangdingensis
T-kangdingroides
T-lijiangensis
T-litangensis
T-luquensis
T-luteus
T-malaisei
T-markamensis
T-meiliensis
T-menyuanicus
T-nebulosus
T-nipponennsis
T-oblifurcus
T-pratensis
T-renzhiensis
T-richthofeni
T-sichuanus
T-sinarabesca
T-variabilis
T-varians
T-varius
T-xizangensis
T-xunhuaensis
T-yeriensis
T-yulongensis
T-yunglongensis
T-yunnanensis
T-zaliensis
T-zhangmoensis
T-zhayuensis
T-zhongzhiensis
Thlibopleurus
Thliptoblatta0(incertae sedis)
Thnesidius(EXTINCT)
Thoe albensStuckey 1909
Thoe neozealandicaCarlgren 1924
Thomasomyine group and Sigmodontinae incertae sedis(non-monophyletic)
Thomasomys
Thomisidae(crab spiders)
Thomisops
Thomisus
Thomomydoecus
T-arleneae
T-asymmetricus
T-barbarae
T-birneyi
T-byersi
T-dickermani
T-genowaysi
T-greeri
T-jamesbeeri
T-johnhafneri
T-markhafneri
T-minor
T-neocopei
T-orizabae
T-peregrini
T-potteri
T-timmi
T-wardi
T-williamsi
T-zacatecae
Thompsoniidae
Thompsonulidae
Thoon
T-aethus
T-canta
T-circellata
T-dubia
T-maritza
T-modius
T-ponka
T-ranka
T-slopa
T-taxes
T-yesta
Thoracastilbus
Thoracica
Thoraciliacus(EXTINCT)
Thoracochirus
Thoracogonus
Thoracophagus
Thoracophorina
Thoracophorini
Thoracophorus
T-(Leipophorus)
T-(Stilbogastrus)
T-(Thoracophorus)
Thoracoprius
Thoracopteridae(EXTINCT)
Thoracostrongylus
Thoracotermes
Thoracotusa
Thorax
Thorelliola
Thoressa
T-aina
T-bivitta
T-cerata
T-decorata
T-fusca
T-gupta
T-horshana
T-hyrie
T-latris
T-masoni
T-monastyrskyi
T-similissima
T-submacula
T-varia
T-xiaoqingae
Thorius
Thorybes
T-bathyllus
T-confusis
T-diversus
T-drusius
T-mexicana
T-pylades
Thracides
T-cilissa
T-cleanthes
T-joannisii
T-nanea
T-panimeron
T-phidon
T-thrasea
Thraupidae(tanagers)
Thraustochytrids
Threskiornithidae(ibises)
Thrichidryas
Thrinacinae1
Thrinacinae2
Thrinaconyx
T-fumosa
T-kirschianus
Thrinaxodontidae(EXTINCT)
Thripidae
Thripsophaga
Throbalium
Throscidae
Throscidium
T-fairmairei
T-germainii
Throscinus
Throscoptilium
Thrypticotrochus
Thunbergioideae
Thyene
Thyenula
Thyestiida(EXTINCT)
Thymelaeaceae
Thymelicini
Thymelicus
T-acteon
T-alaica
T-hamza
T-hyrax
T-leonina
T-lineola
T-silvatica
T-silvestris
T-stigma
Thynninae
Thyreocephalus
Thyreophora
Thyreoxenus
Thyridia
Thyrididae(picture-winged leaf moths)
Thyropteridae(Disk-winged Bats)
Thyrsocera
Thyrsophorinae
Thyrsophorus
Thyrsopsocus
Thysanarthria
Thysanocardia
Thysanoptera(thrips)
ThysanoteuthidaeKeferstein, 1866
Thysanura(silverfish and firebrats)
Thysdariella
Thysdariina
Thysdariopsis
Thysdarius
Tiacellia
Tiarasmilia(EXTINCT)
Ticodendraceae
Ticoplinae
Tiferonia
Tigasis
T-coda
T-colomus
T-fusca
T-garima
T-nausiphanes
T-physcoa
T-simplex
T-viridenex
T-zalates
Tigridia
Tiliactus
/Tilioideae
Timahocoris
Timaliidae(babblers, white-eyes, sylviine warblers)
Timelaea
T-aformis
T-albescens
T-maculata
T-nana
T-radiata
Timema
Timeparthenina
Timeparthenus
Timmiales
Timochares
T-runia
T-ruptifasciata
T-trifasciata
Timochreon
T-doria
T-satyrus
Timogenes
Tinagma(=Douglasia)
Tinamiformes(Tinamous)
Tinaminae (forest tinamous)
Tinamotis(Puna Tinamou and Patagonian Tinamou)
T-ingoufi(Patagonian Tinamou)
T-pentlandii(Puna Tinamou)
Tinamus(Great Tinamou and relatives)
T-guttatus(White-throated Tinamou)
T-major(Great Tinamou)
T-osgoodi(Black Tinamou)
T-solitarius(Solitary Tinamou)
T-tao(Grey Tinamou)
Tinaroo
Tindallia
Tineidae(fungus moths)
Tineodidae(false plume moths)
Tineoidea(bagworm moths, fungus moths, and relatives)
Tingidae(lace bugs)
Tingupidae
Tiomomus
Tiphiidae
Tiphiinae
Tipulidae
Tipulomorpha
Tiracerini
Tiradelphe
Tirumala
T-choaspes
T-euploeomorpha
T-formosa
T-gautama
T-hamata
T-ishmoides
T-limniace
T-petiverana
T-septentrionis
Tirynthia
T-cinica
T-conda
T-conflua
Tirynthioides lotana
Tirynthioides virilis
Tirynthoides
Tisbidae
Tischeria
Tischeriidae(trumpet leafminer moths)
Tisias
T-caesena
T-carystoides
T-lesueur
T-myna
T-quadrata
T-rinda
Tisiphone
T-abeona
T-helena
Tisma
T-acutipennis
T-chopardi
T-freyi
T-grandidieri
T-pauliani
T-peyrierasi
Tismanella
Tismomorpha
T-cherlonneixi
T-inexpectata
T-vitripennis
Tisona(incertae sedis)
Tissanga pretoriae
Tissierella
Titaea
Titanattus
T-cretatus
T-juduliani
T-notabilis
T-novarai
T-paganus
T-pallidus
T-pegaseus
T-saevus
Titanodictya(EXTINCT) (incertae sedis)
Titanoecidae
Titanoptera(EXTINCT)
Titanotricheae
Titanotylopus(EXTINCT)
Titerina rokycanensis(EXTINCT) (Lower-Middle Ordovician) (incertae sedis)
Tithorea
T-harmonia
T-tarricina
Tithoreina
Tithrone
T-catharinensis
T-clauseni
T-corseuili
T-laeta
T-latipennis
T-major
T-roseipennis
Titidiops
Titidius
Tityobuthus
Tityopsis
Tityrinae(tityras)
Tityus
Tivia
Tixcocoba
Tmarus
Tmesiphorini
Tmesiphorinus
Tmesiphorites
Tmesiphoroides(EXTINCT)
Tmesiphoromimus
Tmesiphorus
Tobamovirus
Tobias
Tobiisima
Tobravirus
Todarodes
TodarodinaeAdam 1960
Todaropsis
Todidae(todies)
Todiramphus
Todus angustirostris(Narrow-billed Tody)
Todus mexicanus(Puerto Rican Tody)
Todus multicolor(Cuban Tody)
Todus subulatus(Broad-billed Tody)
Todus todus(Jamaican Tody)
Togaviridae
Togoperla
Togpelenys
Tohlezkus
Tokudaia(incertae sedis)
Tolga
Tolmerinus
Tolypelepidida(EXTINCT)
Tolypella
Tolypotheca
Tolypothrix
Toma
Tombusviridae
Tomeisneria
Tomeplasus
Tomoceridae
Tomocerina
Tomocerus
Tomocoryphusa
Tomocyrba
Tomogenius(~5 species)
Tomoglossa
Tomolonus
Tomomyzinae
Tomopeatinae
Tomoplectus
Tomopteridae
Tomopterna
Tomosvaryella
T-Tomosvaryella sylvicola
T-aegyptium
T-aeneiventris
T-africana
T-agnesea
T-albiseta
T-aliena
T-amazonensis
T-ancylostyla
T-angolensis
T-anomala
T-apicalis
T-appendipes
T-argentea
T-argenteiventris
T-argentifrons
T-argentosa
T-arguta
T-argyrata
T-argyratoides
T-armata
T-aurata
T-baderiensis
T-basalis
T-beameri
T-bidens
T-bissulca
T-botswanae
T-brachybasis
T-brachyscolops
T-brevidens
T-brevijuncta
T-bulganensis
T-caerulescens
T-calcarata
T-caligata
T-chilensis
T-cilifemorata
T-cilifera
T-cilitarsis
T-claripennis
T-columbiana
T-comaousa
T-concavifronta
T-congoana
T-contorta
T-coquilletti
T-cornuta
T-crassifemorata
T-crinita
T-curta
T-curtissima
T-curvipatis
T-debruyni
T-deformis
T-dehraduniensis
T-demeyeri
T-denticulata
T-dentiterebra
T-deserticola
T-diffusa
T-disjuncta
T-dissimilis
T-dividua
T-docta
T-dongyue
T-ekyphysis
T-epichalca
T-equistylis
T-eusylvatica
T-exilidens
T-falkovitshi
T-femella
T-flavicrus
T-flavipes
T-flexa
T-floridensis
T-forchhammeri
T-forter
T-freidbergi
T-frontata
T-galapagensis
T-gazliensis
T-geniculata
T-genitalis
T-gibbosa
T-gobiensis
T-gussakovskyi
T-guwahatiensis
T-hactena
T-helwanensis
T-hildeae
T-hirticollis
T-hispanica
T-hissarica
T-hongorica
T-hortobagyiensis
T-hozretishiensis
T-immutata
T-inazumae
T-incompta
T-incondita
T-inconspicua
T-indica
T-inermis
T-inopinata
T-insulicola
T-israelensis
T-itoi
T-jubata
T-karakalaensis
T-kashipurensis
T-kirghizorum
T-kondarensis
T-kuthyi
T-lata
T-laticlavia
T-latitarsis
T-leimonias
T-lepidipes
T-leri
T-limpidipennis
T-littoralis
T-longipygiamis
T-longiseta
T-longistyla
T-longula
T-luppovae
T-lynchi
T-lyneborgi
T-magyarica
T-manauensis
T-mbuyensis
T-mediocris
T-membranacea
T-membranosa
T-mesasiatica
T-mesostena
T-mexicanensis
T-micronesiae
T-mimica
T-minacis
T-minima
T-miniscula
T-minutus
T-mongolica
T-montana
T-montina
T-multisetae
T-mutata
T-nalaihiana
T-nartshukae
T-nigra
T-nigritula
T-nigronitida
T-nitens
T-nodosa
T-novaezealandiae
T-nyctias
T-oligoseta
T-olympicola
T-ornatitarsalis
T-orthocladia
T-oryzaetora
T-palliditarsis
T-parakuthyi
T-parvicuspis
T-pauca
T-pectinalis
T-pennatula
T-perissosceles
T-pernitida
T-perpusilla
T-pilosiventris
T-platensis
T-polita
T-propinqua
T-propria
T-prostata
T-pruinosa
T-pseudophanes
T-pterae
T-pulchra
T-pusilla
T-quadradentis
T-ramnagariensis
T-relicta
T-resurgens
T-robusta
T-rossica
T-ruwenzoriensis
T-sachtlebeni
T-santiagoensis
T-scalprata
T-scopulata
T-sedomensis
T-sentis
T-sepulta
T-setositora
T-shaoshanensis
T-sigillata
T-similis
T-singalensis
T-singula
T-singularis
T-singuloides
T-songinoensis
T-sonorensis
T-spangleri
T-speciosa
T-spectata
T-spicata
T-spiculata
T-spinea
T-spinigera
T-spinosa
T-spinulenta
T-spinulifera
T-stackelbergi
T-subafricana
T-subhectena
T-subnitens
T-subrobusta
T-subvirescens
T-sugonjaevi
T-sumbarensis
T-surstylae
T-sylvatica
T-sylvaticoides
T-synadelpha
T-synadelphoides
T-tadzhikorum
T-talyshensis
T-tanaitidis
T-tanasijtshuki
T-tattapaniensis
T-taurica
T-tecta
T-teligera
T-tenebricosa
T-tenera
T-teneroidea
T-tenuata
T-torosa
T-toxodentis
T-translata
T-transvaalensis
T-trichotibialis
T-tridens
T-trigona
T-trjapitzini
T-troangulatus
T-trochanterata
T-trochantericola
T-tuberculata
T-turgayica
T-turgida
T-ubsunurensis
T-unguiculatus
T-urdaensis
T-urgamalensis
T-utahensis
T-vagabunda
T-venezuelana
T-verrucula
T-vicina
T-virlai
T-vittigera
T-wilburi
T-xerophila
T-zimini
Tomosvaryellini
Tomoxelia
Tongamya
Tonnoidea
Tonsilla
Tooloom
Topikoglossa
Topocuvirus
Torgos
Tormissini
Tormissus
Tormus
Tornierella
Tornocrusus
Torobus
Torontoceros(EXTINCT)
Torretassoa
Torricellia
Torridincola
T-congolesica
T-natalesica
T-rhodesica
Torridincolidae
Tortanidae
Torticornis(EXTINCT)
Tortricidae(leafroller moths)
Tortricinae(non-monophyletic)
Tortricini
Torvicia
Torvosauridae(EXTINCT)
Torynesis
T-hawequas
T-magna
T-mintha
T-orangica
T-pringlei
Tossunnoria(EXTINCT)
Tosta
T-capra
T-gorgus
T-niger
T-platypterus
T-sapasoa
T-taurus
T-tosta
Totiviridae
Totivirus
Tovariaceae
Townsendiellini
Toxidia
T-andersoni
T-arfakensis
T-doubledayi
T-inornata
T-melania
T-parvula
T-peron
T-rietmanni
T-thyrrhus
Toxidium
Toxocytis
Toxodanuria
T-orientalis
T-parvula
Toxodera
T-denticulata
T-fimbriata
T-integrifolia
T-maculata
T-monstrosa
Toxoderella fortnumi
Toxoderidae
Toxoderini
Toxoderopsini
Toxoderopsis
T-spinigera
T-taurus
Toxomantis
T-sinensis
T-westwoodi
Toxophorinae
Toxothrix
Trabea
Trabeops
Trabisodema
Trabisoides
Trabisostenus
Trabisoxenus
Trachelocyphoides
Trachelocyphus
Trachelostenidae
Trachopeplus
Trachycephalus
Trachydonia
Trachygonidae
Trachyleberididae
Trachymantis
T-dentifrons
T-obesa
Trachymyrmex
T-agudensis
Trachyota
Trachypachidae
Trachypachus
T-gibbsii
T-holmbergi
T-slevini
T-zetterstedi
Trachypauropus
Trachypetinae
Trachyphilonthus
Trachysphaeridae
Trachystegosoma
Tracypum
Tragopan(Tragopans)
T-blythii(Blyth's Tragopan)
T-caboti(Cabot's Tragopan)
T-melanocephalus(Western Tragopan)
T-satyra(Satyr Tragopan)
T-temminckii(Temminck's Tragopan)
Tragospira(EXTINCT)
Tragulidae(chevrotain and mouse deer)
Tragulus javanicus(lesser mouse deer or lesser Malay chevrotain)
Tragulus kanchil
Tragulus napu(greater mouse-deer)
Tragulus nigricans
Tragulus versicolor
Tragulus williamsoni
Tralichia
Tramiathaea
Tranomeringia
Tranopelta
T-gilva
T-subterranea
Trapellitermes
Trapezites
T-argenteoornatus
T-eliena
T-heteromacula
T-iacchoides
T-iacchus
T-luteus
T-macqueeni
T-maheta
T-petalia
T-phigalia
T-phigalioides
T-praxedes
T-sciron
T-symmomus
T-waterhousei
Trapezitinae
Trapezodirus
Traquairaspidiformes(EXTINCT)
Trebacosa
Trebiidae
Trebouxiophyceae
Trechaleidae
Trechini
Trechisporales
Trechitae
Trematoda
Trematopidae(EXTINCT)
Trematotrochus
Tremellales
Tremellomycetes
Tremissus
TremoctopodidaeTryon, 1879
Trepacmes
Trephisa
Treponema
Trepopaussus
Trepostomata
Treptoplax reptans
Triacanthidae
Triacanthodidae
Triacrus
Triactis
T-productaKlunzinger 1877
Triadobatrachus massinoti(EXTINCT)
Triadocupedidae(EXTINCT)
Triadocupes(EXTINCT)
Triadophlebiomorpha(EXTINCT)
Triangularitermes
Triaplidae(EXTINCT)0(incertae sedis)
Triaplus laticoxa
Triaplus macroplatus
Triarthron
Triartiger
Triassocatinius(EXTINCT)
Triassocoleus(EXTINCT)
Triassomachilis uralensis(EXTINCT).
Triastaria
Tribalasia(1 species)
Tribalinae(non-monophyletic)
Triballodes
Tribalus(~50 species)
Tribasodema
Tribasodes
Tribasodites
Tribatus
Tribeles australis
Tribonium
Tricassa
Triceratomerus
Trichadenopsocus
Trichadenotecnum
Trichasteropsida(EXTINCT)
Trichechidae(manatees)
Trichechus inunguis(Amazonian manatee)
Trichechus manatus(West Indian Manatee)
Trichechus senegalensis(West Aftican manatee)
Trichidryas
Trichillinus
Trichiusa
Trichobatrachus
Trichoblaniulidae
Trichoblatta
Trichocephalida
Trichocerca
Trichocercidae
Trichoceridae
Trichococcus
Trichocosmetes
Trichodectidae
Trichodectini
Trichodectoidea
Trichodesmium
Trichodonia
Trichodromeus
Trichoglossina
Trichoglossum
Trichognathus
Trichogrammatidae
Tricholimnichus
Tricholinus
Tricholomataceae s. str.
Trichomatosus
Trichomicra
Trichomycteridae
Trichonemasomatidae
Trichonomorphus
Trichonychina
Trichonychini
Trichonyx
Trichopagis
Trichopedius
Trichopetalidae
Trichophassus giganteus
Trichophilopteridae
Trichophilopteriformia
Trichophora
Trichophyinae
Trichoplax adhaerens
Trichopnites
Trichopodaceae
Trichopseniini
Trichopsenius
Trichoptera(caddisflies)
Trichoreninus
Trichosporeae-1
Trichosporeae-2
Trichostephanus
Trichotermes
Trichotheliales
Trichotobia
Trichotria
Trichotriidae
Tricladida
Tricolpochila
Triconodonts(EXTINCT)
Tricorythidae
Trictena
T-argyrosticha
T-atripalpis
T-barnardi
Tricupes(EXTINCT)
Tricytarus parviumgulatus(incertae sedis)
Tridactylidae
Tridactylinae
Tridactyloidea
Tridactylophagus
T-borneoensis
T-buttonensis
T-canberraensis
T-ceylonensis
T-coniferus
T-harzi
T-maculatus
T-mysorensis
T-similis
T-sinensis
T-tartaria
Tridentaforma(incertae sedis)
Tridentellidae(F.)
Trifolieae(monophyly uncertain)
Trifurcula
Triglotta
Trigonaloidea
Trigoniaceae
Trigoniulidae
Trigonobregma
Trigonoceps
Trigonodemus
Trigonoglossina
Trigonopalpus
Trigonoplectus
Trigonopselaphus
Trigonopterygidae
Trigonopteryginae
Trigonopterygoideas. n.
Trigonotoma
Trigonurinae
Trilobites(EXTINCT)
Trilobitideini
Trilobophorus afarensis(EXTINCT)
Trilophosauria(EXTINCT)
Trimenia
Trimenoponidae
Trimicerus
Trimiina
Trimioarcus
Trimiodina
Trimiodytes
Trimiomelba
Trimiomorphus
Trimiophanes
Trimioplectus
Trimiopsis
Trimiosella
Trimiovillus
Trimium
Trina
Trinervitermes
Trioblattella
Triodia
T-adriaticus
T-amasinus
T-froitzheimi
T-laetus
T-mlokossevitschi
T-nubifer
T-sylvina
Triodontidae
Triomicrus
Triosteum
Triozidae
Triozocera
T-africana
T-bedfordensis
T-boharti
T-ceylonesis
T-cooloolaensis
T-curvimaxllaria
T-dundoana
T-endrodyi
T-gigantea
T-innisfailensis
T-katherinensis
T-macrocysti
T-maxi
T-mexicana
T-minor
T-moorookensis
T-papuana
T-paradisea
T-paulistana
T-pugiopenis
T-rydalmeriensis
T-siamensis
T-taxana
T-tecpanesis
T-vernalis
Tripectenopus
Tripetalocerinae
Triphoroidea
Triphysa(incertae sedis)
T-dohrnii
T-nervosa
T-phryne
Tripleuchlanis
Triplignathia
Triplonchida
Triplosarus
Triplostegia glandulifera
Tripocoleus rambulosus(EXTINCT) (incertae sedis)
Triprion
Trirammatus
T-lacordairei
T-chaudoiri
T-ignobilis
T-selkirki
T-skottsbergi
T-torqueotrochantus
T-unistriatus fulgidus
T-unistriatus nocticolor
T-unistriatus unistriatus
Trisignis
Trisinarthrus
Trisiniotus
Trisinus
Trisporusa
Trissemus
T-(Apotrissemus)
T-(Corynecerus)
T-(Trissemidius)
T-(Trissemodes)
T-(Trissemus)
Trissevania anemotis
Tristiridae
Trite
T-albopilosa
T-auricoma
T-bimaculosa
T-concinna
T-daemeli
T-gracilipalipis
T-herbigrada
T-ignipilosa
T-lineata
T-longipalpis
T-longula
T-ornata
T-pennata
T-planiceps
T-rapaensis
T-rubriceps
T-urvillei
T-vulpecula
Tritheledontidae(EXTINCT) (Ictidosauria)
Tritomurus
Tritonus
Tritoxidium
Triturus
Triuridaceae
Trixocelidae
Trizethopsis
Triznaka
Trochanteriidae
Trocharanis
Trochilidae(hummingbirds)
Trochocyathus
Trochodendraceae
Trochosa
Trochosippa
Trochosula
Troctomorpha(parasitic lice {=Phthiraptera] and book lice)
Troctopsocidae
Trogactus
Trogaster
Trogasteropsis
Trogastrina
Trogastrini
Trogiomorpha(bark lice)
Troglamaurops
Trogloblattella
Troglocambarus
Troglochares
Troglocharinus
T-(Antrocharidius)
T-(Troglocharinus)
Troglocormus
Troglocyphodas
Troglodromus
Troglodytidae(wrens)
Trogloglanis
Troglomethes
Troglophyes
Troglorites
Troglosternus
Troglotayosicus
Trogoniformes(Trogons)
Trogopterus
Trogossitidae(bark-gnawing beetles, cadelles)
Trogoxylini
Trogoxylon
Troidini
Tromba
T-tromba
T-xanthura
Trombiculoidea
Trombidiformes(= Sphaerolichida + Prostigmata)
Trombidioidea
Troodontidae(EXTINCT)
Tropaeolaceae
Tropeogaster
Tropheryma
Trophosphaera
Tropidamaurops
Tropidera
Tropidocerus
Tropidocyathus
Tropidomantinae(non-monophyletic)
Tropidomantis
T-(Eomantis)
TE-guttatipennis
TE-iridipennis
TE-yunnanensis
T-(Tropidomantis)
TT-gressitti
TT-tenera
Tropidopolinae
Tropiduchidae
Tropiduridae
Tropidurinae
Tropimenelytron
Tropiochara
Tropiopterius
Tropisternus
T-(Homostethus)
T-(Pleurhomus)
T-(Pristoternus)
T-(Strepitornus))
T-(Tropisternus)
Tropoleptusa
Tropopsis
T-biguttatus
T-marginicollis
Tropopterina
Tropopterus
Troposilusa
True crickets and allies
Truebella
Truncatoflabellum
Trymalius
Tryonicus
Trypanaeinae
Trypanaeus
Trypetesidae
Trypetheliaceae
Tsagantegia(EXTINCT)0(incertae sedis)
Tsaidamotherium(EXTINCT)
Tsaitermes
Tselfatiformes(EXTINCT)Cretaceous fossils
Tshekardocoleidae(EXTINCT)
Tshekardocoleus(EXTINCT)
Tshekardohymen(EXTINCT)
Tshitsherinella
Tsitana
T-dicksoni
T-tsita
T-tulbagha
T-wallacei
Tsuga(s.l.)
Tsukamurella
Tubarieae
Tuberaphis
Tuberculitermes
Tuberoplectus
Tubeufia
Tubeufiaceae
Tubiluchidae
Tubulanidae
Tubulidentata(aardvark)
Tubulifera
Tubulister
Tuccidae
Tugana
Tulerpeton(EXTINCT)
Tullgrenella
Tulpius
T-gauchus
T-hilarus
Tumboecus
Tumucania
Tumulipcinus
Tumulitermes
Tungidae
Tupaia(tree shrews) (monophyly uncertain)
T-belangeri
T-chrysogaster
T-dorsalis
T-glis
T-gracilis
T-javanica
T-longipes
T-minor
T-miocenica(EXTINCT)
T-moellendorffi
T-montana
T-nicobarica
T-palawanensis
T-picta
T-splendidula
T-tana
Turanovia(EXTINCT)
Turbanellidae
Turbellaria
Turbinolia
Turbinoliidae
Turcocerus(EXTINCT)
Turdidae(thrushes)
Turesis
T-basta
T-complanula
T-osibius
T-tabascoensis
T-theste
Turgiditarsus
Turicella
Turicibacter
Turmada
T-camposa
T-turmada
Turnbullia(EXTINCT) (incertae sedis)
Turneraceae
Turneria
T-arbusta
T-bidentata
T-collina
T-dahlii
T-frenchi
T-pacifica
T-postomma
Turnerina
T-hazelae
T-mejicanus
Turneropterum(EXTINCT)
Turnicidae(button-quails)
Tutelina
T-elegans
T-formicaria
T-hartii
T-similis
Tuxenentulus
Tuxenidia
Two Lipped Corolla Lineage
Two Medicine tyrannosaurine(EXTINCT)
Tychini
Tychobythinus
Tychomorphus
Tychonema
Tychticupes(EXTINCT)
Tychticupoides grjasevi(EXTINCT)
Tychtodelopterum(EXTINCT)
Tychus
Tydeoidea
Tylenchida
Tylogonus
T-arizonensis
T-auricapillus
T-craneae
T-dentichelis
T-miles
T-minutus
T-morosus
T-parabolicus
T-pichincha
T-prasinus
T-putumayo
T-vachoni
T-viridimicans
Tylois
Tylolasius inflatus(EXTINCT) (incertae sedis)
Tylomantis
T-armillata
T-fuliginosa
Tylomicrus
Tylomyinae(vesper and climbing rats)
Tylomys
Tyloperla
Tyloplatyola
Tylopoda(camels, llamas, and extinct relatives)
Tylopterella(EXTINCT) (incertae sedis)
Tylosema
Tylototriton
Tylotrocha
Tymbira
Tymoviridae
Tympallopatrum
Tympanogaster
T-(Hygrotympanogaster)
T-(Plesiotympanogaster)
T-(Topotympanogaster)
Tympanophorinae(Balloon-winged katydids)
Tympanophorus
Tympanuchus(Sharp-tailed Grouse and Prairie Chickens)
T-cupido(Greater Prairie Chicken)
T-pallidicinctus(Lesser Prairie Chicken)
T-phasianellus(Sharp-tailed Grouse)
Typhaceae
Typhedanus
T-ampyx
T-aziris
T-crameri
T-cursinoi
T-eliasi
T-galbula
T-optica
T-salas
T-stylites
T-umber
T-undulatus
Typhlholotrochus
Typhlobatrisus
Typhloblatta
Typhloblattodes
Typhlobledius
Typhlobolellidae
Typhlobythus
Typhlochactas
Typhlochactinae
Typhlochoromus
Typhlocyptus
Typhloiulopsis
Typhlokahusia
Typhloleleupius
Typhloleptodes
Typhloleptus
Typhlomalota
Typhlomyophthirus bifoliatus
Typhlomyrmex
T-clavicornis
T-foreli
T-major
T-prolatus
T-pusillus
T-rogenhoferi
Typhlonusa
Typhlopolemon
Typhloponemys
Typhloraffrayia
Typhlorites
Typhloscolecidae
Typhlosorius
Typhlozethodes
Typhlozethus
Typhlozyras
Typhoctinae
Typhulaceae
Tyranni(tyrant flycatchers and relatives)
T-dae
Tyrannides(New World suboscines)
Tyrannomastax
Tyrannophasma gladiator
Tyrannophryne
Tyrannosauridae(EXTINCT)
Tyrannosaurinae(EXTINCT)
Tyrannosauroidea(EXTINCT)
Tyrannosaurus rex(EXTINCT)
Tyraphus
Tyrina
T-sius
Tyrini
Tyrocarius
Tyrodes
Tyrogatunus
Tyrogetus
Tyromacrus
Tyromorphus
Tyronia
Tyropsidius
Tyropsis
Tyrranomyrmex rex
Tyrrhenoluectra
Tyrrhenotragus(EXTINCT)
Tyrus
Tyto
T-alba(Barn Owl)
T-aurantia(Golden Masked Owl)
T-capensis(Grass Owl)
T-glaucops(Ashy-faced Owl)
T-inexspectata(Minahassa Masked Owl)
T-manusi(Manus Masked Owl)
T-multipunctata(Lesser Sooty Owl)
T-nigrobrunnea(Taliabu Masked Owl)
T-novaehollandiae(Australian Masked Owl)
T-rosenbergii(Sulawesi Masked Owl )
T-sororcula(Moluccan Masked Owl)
T-soumagnei(Red Owl)
T-tenebricosa(Greater Sooty Owl)
Tytonidae(Barn Owls, Masked Owls, and relatives)
Tyxs
tachypoides-group
tettigonioids
"titanoglanis"(incertae sedis)
tricholomatoid(monophyly uncertain)